Pipe clamp



Aug.'l 30, 1927.

c. c. GALLERY PIPE CLAMP Filed Oct.

Patented Aug. 3Q, i927.

' `onnrsrorrrna o. GALLERY, or ywasn* conrnsvntn, iria-iinsirrnirnnrA.Y

- 'rire' CLAMP.

Application flied nemer l YThis-invention relatesfto an improv-eddevicewhichmay be conveniently referredto ls a pipe clamp, the same being adapted to e"used"in connection with the jaws 'of a '5 vise or equivalent structurek for firmly holding a'section of pipe while-thesame is being threaded, either internally or externally.

Briey, the invention has reference toa clamp which is made up of a pair of hingedlo ly connected half-sections between the opposed faces of which the pipe is firmly held,l

each half section being composed of detachably connected substantially semi-circular grips nested together ina novelrmanner.

Considered from a different aspect, the semi-circular grips may be said'to be halves of split bushing, each bushing being of a A predetermined size so that one or more of the bushings may be removed to accommodate pipes of smaller or greater diameter, as

`the case may be.

My principal aim is to generally improve v upon inventions of this class by providing one of comparative simplicity and durability which is constructed to assure a firm and eflicient grip on the pipey in a manner to prevent undue marring of the surface, and possible crushing from any powerful pressure fromthe jaws of the vise.

Other features and advantages of the invention will become apparent from the following description and drawing.

In the accompanying drawing formingk a part of this application, and in which like numerals are employed to designate like parts throughout the same.

Figure l is anvend elevation of a pipe clamp constructed in accordance with the' present invention, showing the manner in which it cooperates with a section of pipe and with the jaws of a vise.

Figure 2 is a top plan view with a portion broken away and shown in section.

Figure 3 is a central section through the clamp on the pipe. j

Figure 4t is a perspective view of one of the details. v

Referring to the drawings in detail the reference character A .designates the body portion of one of the jaws ofa conventional pipe holding vise or its equivalent, andB designates the face plate thereof. v

The improved clamp, which is adapted to be placed -between the plates B comprises, as` before intimated, a pair of duplicate half-sections l hingedly connected together asyat Each half section'is: variableI in form, and is made up of an outer compara.- tively-.rhard Vmetal segment 3 forming one- "half of. the outer-casing. Coninedswithin thissectionall casing are what may. be reflfe'rred to as longitudinally "splitjbushings, each of which is removable to permit the central opening ofv the clamp to be varied in diameter to accommodate pipes of different diameters.

Each bushing is actually made up of duplicate semi-circular halves 4 gradually decreasing in size toward thecenter.k In fact the innermost halves may be reduced in thickness. Moreover, as shown in Figure 4 each half is formed with longitudinally spaced holes 5 through which lugs 6 on an adjacent section pass. In addition, notches 7 are formed in the upper ends of the halves to facilitate separation.

It is yet to be pointed out that appropriate spring latches may be connected with one of the half sections l to coact with keepers 9 in the other half sections to hold the two half sections `together when the clamp is removed from the latch.

From the foregoing description it is obvious that the half sections Vof the clamp are swung apart and that-the pipe l() is placed therebetween, after which the clamp and the pipe are placed between the face plates of the jaws, and the jaws piped in the usual manner, thereby obtaining an indirect grip through the medium of the clamp on the pipe. The fact that the clamp is cylindrical inform and compara-tivelyV long, affordsa grip havingconsiderable area, and thereby guarding against crushing and injury of the pipe. In this connection I wish to call attention to the fact that the outer casing formed by the halves 3 is of comparatively hard metal, while 1 the` interconnected or nested bushing forming sectionsl are of a more or less malleable metal.

The gist of the invention resides in the particular construction, arrangement of parts wherein sectional j bushings are conned within a sectional casing, the sections of the bushingsbeing nested together and held in assembled relation by projections fitting into complemental openings so that by using a suitable instrument, the sections may be pried apart to adjust the central opening to any desired diameter to lit different diameters of pipes.

The invention will be clear to those skilled pbufality of bushings arranged in said oaeing, each bashing being composed oi a pair of half-sections of Syn'inietrieal configuration, and izo-acting' ineans between the adjacent sections of the respective bushings for maintaining said sections in nested relation, whereby to adapt said device for clampingl pipes of various diameters, said co-aeting nieans comprising lugs on the outer faces of said sections fittingr into` correspondingly shaped holes on the inner faces of the cooperating sections.

In testimony whereof I aiiix my signature.

CHRISTOPHER C. GALLERY. 

